A multiple view system uses two or more distinct views to support the investigation of a single conceptual entity. Many such systems exist, ranging from computer-aided design (CAD) systems for chip design that display both the logical structure and the actual geometry of the integrated circuit to overview-plus-detail systems that show both an overview for context and a zoomed-in-view for detail. Designers of these systems must make a variety of design decisions, ranging from determining layout to constructing sophisticated coordination mechanisms. Surprisingly, little work has been done to characterize these systems or to express guidelines for their design. Based on a workshop discussion of multiple views, and based on our own design and implementation experience with these systems, we present eight guidelines for the design of multiple view systems.
The Stanford InfoBus is a prototype infrastructure developed as part of the Stanford Digital Libraries Project to extend the current Internet protocols with a suite of higherlevel information management protocols. This paper surveys the five service layers provided by the Stanford InfoBus: protocols for managing items and collections (DLIOP), metadata (SMA), search (STARTS), payment (UPAI), and rights and obligations (FIRM).
The Notable annotation system enables users to annotate paper documents using handheld devices in a mobile environment. This paper describes the design issues and solutions that arose in creating Notable, with a particular focus on design challenges at the intersection of annotations and handheld technology. Novel design strategies include separating the annotation writing platform from the document viewing platform, providing search as the method for document selection, offering context-sensitive phrase completion and icon-based graphical pinning for fine-granularity annotation anchoring, and including some support for coordinating group annotation activity.
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